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9.2
SPIP 4.4.8 and earlier allows malicious code to run due to untrusted data
CVE-2026-27475
Summary
A security issue in SPIP 4.4.8 and earlier allows an attacker to execute malicious code. This happens when an attacker can place malicious data in a specific area of the site. To protect against this, upgrade to SPIP 4.4.9 or later, which fixes this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| spip | spip | > 4.4.0 , <= 4.4.9 | – |
Original title
SPIP before 4.4.9 allows Insecure Deserialization in the public area through the table_valeur filter and the DATA iterator, which accept serialized data. An attacker who can place malicious seriali...
Original description
SPIP before 4.4.9 allows Insecure Deserialization in the public area through the table_valeur filter and the DATA iterator, which accept serialized data. An attacker who can place malicious serialized content (a pre-condition requiring prior access or another vulnerability) can trigger arbitrary object instantiation and potentially achieve code execution. The use of serialized data in these components has been deprecated and will be removed in SPIP 5. This vulnerability is not mitigated by the SPIP security screen.
nvd CVSS3.1
8.1
nvd CVSS4.0
9.2
Vulnerability type
CWE-502
Deserialization of Untrusted Data
- https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html Vendor Advisory Release Notes
- https://git.spip.net/spip/spip Product
- https://www.vulncheck.com/advisories/spip-insecure-deserialization Third Party Advisory
Published: 19 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026